Description

When pointing device-specific event handlers are the only mechanism available
to invoke a function of the content, users with no vision (who cannot use
devices such as mice that require eye-hand coordination) as well as users
who must use alternate keyboards or input devices that act as keyboard
emulators will be unable to access the function of the content.

Examples

Failure Example 1

The following example is of an image that responds to a mouse click
to go to another page. This is a failure because the keyboard cannot
be used to move to the next page.
<p><img onmousedown="nextPage();" src="nextarrow.gif"
alt="Go to next page"></p>